CN108828894A - A kind of 3D light field display system and method - Google Patents
A kind of 3D light field display system and method Download PDFInfo
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- CN108828894A CN108828894A CN201810580221.9A CN201810580221A CN108828894A CN 108828894 A CN108828894 A CN 108828894A CN 201810580221 A CN201810580221 A CN 201810580221A CN 108828894 A CN108828894 A CN 108828894A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
Abstract
It includes array of rear-projectors, diffusion barrier and microlens array that the embodiment of the present invention, which provides a kind of 3D light field display system and method, the system,；The array of rear-projectors two sides positioned at diffusion barrier parallel with microlens array；There is the first spacing between array of rear-projectors and diffusion barrier, there is the second spacing between diffusion barrier and microlens array；Array of rear-projectors includes at least two projectors, and the diffusion zone of each diffusion point is cone in diffusion barrier；This method projects original image by multiple projectors in array of rear-projectors, expand the diffusion angle of light in each original image by diffusion barrier simultaneously, the light that pixel each in projector issues is diffused into the entire lenticule of covering even more than lenticule, to achieve the purpose that adequately to control light and display light field coded image, to reconstruct the 3D rendering of higher resolution；The system structure is simple, low in cost, which can reconstruct high-resolution 3D rendering, meets the demand that 3D light field is shown.
Description
Technical field
The present embodiments relate to light field field of display technology, more particularly, to a kind of 3D light field display system and side
Method.
Background technique
In light field display technology, the integration imaging light field display technology based on microlens array can be provided continuously due to it
Viewing range and true color 3-D effect the advantages of become main light field display technology.
Optical field acquisition technology is broadly divided into two major classes, and the first kind is that lens array adds charge coupled cell (Charge-
Coupled Device, CCD), the light-field camera of composition, advantage is that structure is simple, facilitates operation, need to only carry out once photo taking
The information of different angle can be recorded, but due to the information that a CCD needs to record all angles, will lead to the image of acquisition
Resolution ratio is very low.The acquisition array that second class is made of camera array, advantage are acquired image high resolutions, three-dimensional
Information is more, but structure is complicated, not easy to operate.
Existing light field shows that equipment is mainly based upon liquid crystal display and the light field of microlens array composition shows equipment,
Due to the limitation of existing liquid crystal display resolution ratio, light field is caused to show that equipment does not have enough resolution ratio that reconstruct is gone really to force
Genuine three-dimensional image；It eventually leads to existing light field and shows that the three-dimensional image resolution ratio of equipment reproduction is low, the depth of field is small, viewing visual angle is small.
And based on the integration imaging light field display technology of itself and microlens array of liquid crystal display, the clarity of the three-dimensional image finally reproduced
Resolution ratio with liquid crystal display is directly related, and commercial liquid crystal display highest resolution is 7680*4320 now, for mentioning
High 3D display effect is limited.For example, it is 40 degree that 3D light field, which shows that equipment needs the viewing visual angle in horizontal and vertical direction, single angle
Degree resolution ratio needs 800*600, then the total resolution needed is 40*40*800*600=7.68*108, but currently on the market
The resolution ratio of 8K display be only 7680*4320=3.32*107, and it is expensive；Existing light field shows that equipment meets not
The demand that 3D light field is shown.
Summary of the invention
In order to overcome the above problem or at least be partially solved the above problem, the embodiment of the present invention provides a kind of 3D light field
Display system and method.
The embodiment of the present invention provides a kind of 3D light field display system, including：Array of rear-projectors, diffusion barrier and lenticule battle array
Column；It is parallel to each other between array of rear-projectors, diffusion barrier and microlens array, array of rear-projectors and microlens array are located at diffusion barrier
Two sides；There is the first spacing between array of rear-projectors and diffusion barrier, there is the second spacing between diffusion barrier and microlens array；
Array of rear-projectors includes at least two projectors, and the diffusion zone of each diffusion point is cone in diffusion barrier；Microlens array
Including multiple lenticules.
Wherein, the first spacing is：
In above formula, p1For the diameter of the exit lens of projector；θ is maximum angle, which is same in projector
The angle between light after two marginal points refraction of the light that one pixel issues by exit lens, and two marginal points
Between the line center that passes through exit lens.
Wherein, the second spacing is：
In above formula, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, which is
The angle between light after two marginal points refraction of the light that same pixel issues in projector by exit lens, and
The center that line between two marginal points passes through exit lens.
Wherein, the arrangement mode of microlens array includes matrix form arrangement or cellular arrangement.
Wherein, lenticule is light collecting lens.
The embodiment of the present invention also provides a kind of 3D light field display methods, including：Original image is thrown by array of rear-projectors
It is mapped on diffusion barrier, wherein array of rear-projectors includes at least two projectors, and each projector is original in diffusion barrier projection one
Image；Keeping the distance between array of rear-projectors and diffusion barrier is the first spacing, will be in each original image by diffusion barrier
Light is diffused；Light after diffusion is reconstructed into 3D rendering by microlens array, and keeps microlens array and diffusion
The distance between film is the second spacing；3D rendering is received at the third spacing apart from microlens array, third spacing is：
In above formula, g is the second spacing, and f is the focal length of lenticule.
Wherein, the first spacing is：
In above formula, p1For the diameter of the exit lens of projector；θ is maximum angle, which is same in projector
The angle between light after two marginal points refraction of the light that one pixel issues by exit lens, and two marginal points
Between the line center that passes through exit lens.
Wherein, the second spacing is：
In above formula, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, which is
The angle between light after two marginal points refraction of the light that same pixel issues in projector by exit lens, and
The center that line between two marginal points passes through exit lens.
A kind of 3D light field display system and method provided in an embodiment of the present invention, the system include array of rear-projectors, diffusion
Film and microlens array；It is parallel to each other between array of rear-projectors, diffusion barrier and microlens array, array of rear-projectors and lenticule battle array
Column are located at the two sides of diffusion barrier；There is the first spacing, between diffusion barrier and microlens array between array of rear-projectors and diffusion barrier
With the second spacing；Array of rear-projectors includes at least two projectors, and the diffusion zone of each diffusion point is circular cone in diffusion barrier
Body；Microlens array includes multiple lenticules；This method projects original image by multiple projectors in array of rear-projectors,
The diffusion angle for expanding light in each original image by diffusion barrier simultaneously, the light that pixel each in projector is issued
The entire lenticule of covering is diffused to even more than lenticule, projects image progress adequately control light to reach to multiple projectors
With display light field coded image purpose, to reconstruct the 3D rendering of higher resolution；The system structure is simple, low in cost,
This method is easy to operate, which can reconstruct high-resolution 3D rendering, meets the demand that 3D light field is shown.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the schematic diagram according to the 3D light field display system of the embodiment of the present invention；
Fig. 2 is the top view according to the 3D light field display system of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram according to the microlens array of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of 3D light field display system, with reference to Fig. 1, including：Array of rear-projectors 1,2 and of diffusion barrier
Microlens array 3；It is parallel to each other between array of rear-projectors 1, diffusion barrier 2 and microlens array 3, array of rear-projectors 1 and lenticule
Array 3 is located at the two sides of diffusion barrier 2；There is the first spacing, diffusion barrier 2 and lenticule battle array between array of rear-projectors 1 and diffusion barrier 2
There is the second spacing between column 3；Array of rear-projectors 1 includes at least two projectors, the diffusion region of each diffusion point in diffusion barrier 2
Domain is cone；Microlens array 3 includes multiple lenticules.
Specifically, 3D light field display system provided in this embodiment includes array of rear-projectors 1, diffusion barrier 2 and lenticule battle array
Column 3, wherein it is parallel to each other between array of rear-projectors 1, diffusion barrier 2 and microlens array 3, array of rear-projectors 1 and microlens array
3 are located at the two sides of diffusion barrier 2；There is the first spacing, diffusion barrier 2 and microlens array 3 between array of rear-projectors 1 and diffusion barrier 2
Between have the second spacing；Array of rear-projectors 1 includes at least two projectors, the diffusion zone of each diffusion point in diffusion barrier 2
For cone；Microlens array 3 includes multiple lenticules.Array of rear-projectors 1 launches several original images, and each original image exists
It is imaged on the diffusion barrier 2 in 3 front of microlens array, every Ray Of Light in each original image that array of rear-projectors 1 is launched is all
Can by diffusion barrier 2 and diffuse into it is coniform, by setting diffusion barrier 2 and microlens array 3 between the second spacing, make to project
The light that each pixel issues in instrument diffuses to the entire lenticule of covering even more than the plane where lenticule, by micro-
The control light of lens array 3 can finally reconstruct high-resolution 3D picture in space.Therefore, by every in superposition array of rear-projectors 1
The total resolution of display can be improved in the original image of one projector projects, if the resolution ratio of single projector is M*N, projector
Array 1 includes K projector, then the total resolution of the display image constituted on diffusion barrier 2 is M*N*K, using lenticule battle array
The control light of column 3, the image of final available higher resolution, can satisfy resolution requirements required for light field 3D display.
The present embodiment projects original image by multiple projectors in array of rear-projectors, while being expanded by diffusion barrier
It is entire micro- to be diffused to covering by the diffusion angle of light in each original image for the light that pixel each in projector issues
Mirror projects image progress adequately control light and display light even more than the plane where lenticule, to reach to multiple projectors
The purpose of field coded image, to reconstruct the 3D rendering of higher resolution；The system structure is simple, low in cost, easy to operate,
The 3D rendering of energy display of high resolution, meets the demand that 3D light field is shown.
Based on above embodiments, with reference to Fig. 2, the first spacing is：
In above formula, p1For the diameter of the exit lens of projector；θ is maximum angle, which is same in projector
The angle between light after two marginal points refraction of the light that one pixel issues by exit lens, and two marginal points
Between the line center that passes through exit lens.
Specifically, projector has optical system, and the optical system in projector includes an exit lens, and the outgoing is saturating
Mirror is collector lens, and effect is that the image that will be saved in projector is externally imaged, and is issued to each pixel in image
Light carries out optically focused.In order to reach optimal effect, diffusion barrier should be located at each pixel institute in the image saved in projector
The focus point of the light of sending, first spacing is the focus point with a distance from exit lens, and first spacing is：
In above formula, p1For the diameter of the exit lens of projector；θ is maximum angle, which is same in projector
The angle between light after two marginal points refraction of the light that one pixel issues by exit lens, and two marginal points
Between the line center that passes through exit lens.
Based on above embodiments, with reference to Fig. 2, the second spacing is：
In above formula, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, which is
The angle between light after two marginal points refraction of the light that same pixel issues in projector by exit lens, and
The center that line between two marginal points passes through exit lens.
Specifically, the diffusion angle of diffusion barrier is α, a diffusion point on corresponding diffusion barrier, certain in corresponding projector
The light that one pixel issues, the angle for being incident on the light of the diffusion point is θ, and θ is maximum angle, which is projection
The angle between light after two marginal points refraction of the light that the pixel issues in instrument by exit lens, and two sides
Line between edge point is by the center of exit lens, then maximum angle of the light that the pixel issues after spreading membrane diffusion
For ω=α+θ, in order to guarantee that light that the pixel issues can cover the entire plane of lenticule, root after spreading membrane diffusion
According to geometrical relationship, the second spacing between diffusion barrier and microlens array is：
In above formula, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, which is
The angle between light after two marginal points refraction of the light that same pixel issues in projector by exit lens, and
The center that line between two marginal points passes through exit lens.
The present embodiment guarantees the light of each pixel sending in projector through spreading membrane diffusion by the second spacing of setting
The entire plane of lenticule can be covered, afterwards to guarantee 3D imaging effect.
Based on above embodiments, with reference to Fig. 3, the arrangement mode of microlens array includes matrix form arrangement or cellular row
Cloth.
Based on above embodiments, lenticule is light collecting lens, and light collecting lens include unilateral convex lens, bilateral convex lens
Or two sides are respectively convex surface and concave surface but have the lens of light-focusing function.
The embodiment of the present invention also provides a kind of 3D light field display methods, including：Original image is thrown by array of rear-projectors
It is mapped on diffusion barrier, wherein array of rear-projectors includes at least two projectors, and each projector is original in diffusion barrier projection one
Image；Keeping the distance between array of rear-projectors and diffusion barrier is the first spacing, will be in each original image by diffusion barrier
Light is diffused；Light after diffusion is reconstructed into 3D rendering by microlens array, and keeps microlens array and diffusion
The distance between film is the second spacing；3D rendering is received at the third spacing apart from microlens array, third spacing is：
In above formula, g is the second spacing, and f is the focal length of lenticule.
Wherein, the first spacing is：
In above formula, p1For the diameter of the exit lens of projector；θ is maximum angle, which is same in projector
The angle between light after two marginal points refraction of the light that one pixel issues by exit lens, and two marginal points
Between the line center that passes through exit lens.
Wherein, the second spacing is：
Wherein, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, which is to throw
The angle between light after two marginal points refraction of the light that same pixel issues in shadow instrument by exit lens, and two
The center that line between a marginal point passes through exit lens.
Specifically, the 3D light field display methods of the present embodiment is realized by the 3D light field display system of above embodiments,
Concrete implementation method is described in the 3D light field display system of above-described embodiment, and details are not described herein again, herein
It is emphasized that the 3D rendering reconstructed in the 3D light field display system of above-described embodiment, observer can be apart from lenticule
The 3D rendering is received at the third spacing of array, which is：
Wherein, g is the second spacing, and f is the focal length of lenticule.
The present embodiment projects original image by multiple projectors in array of rear-projectors, while being expanded by diffusion barrier
It is entire micro- to be diffused to covering by the diffusion angle of light in each original image for the light that pixel each in projector issues
Mirror projects image progress adequately control light and display light even more than the plane where lenticule, to reach to multiple projectors
The purpose of field coded image, to reconstruct the 3D rendering of higher resolution；The system structure is simple, low in cost, easy to operate,
The 3D rendering of energy display of high resolution, meets the demand that 3D light field is shown.
Finally, it is stated that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although ginseng
According to previous embodiment, invention is explained in detail, those skilled in the art should understand that：It still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (8)
1. a kind of 3D light field display system, which is characterized in that including：Array of rear-projectors, diffusion barrier and microlens array；
It is parallel to each other between the array of rear-projectors, the diffusion barrier and the microlens array, the array of rear-projectors and institute
State the two sides that microlens array is located at the diffusion barrier；
There is the first spacing, between the diffusion barrier and the microlens array between the array of rear-projectors and the diffusion barrier
With the second spacing；
The array of rear-projectors includes at least two projectors, and the diffusion zone of each diffusion point is circular cone in the diffusion barrier
Body；The microlens array includes multiple lenticules.
2. system according to claim 1, which is characterized in that first spacing is：
Wherein, p1For the diameter of the exit lens of projector；θ is maximum angle, and the maximum angle is same pixel in projector
The angle between light after two marginal points refraction of the light that point issues by exit lens, and between two marginal points
The center that line passes through exit lens.
3. system according to claim 1, which is characterized in that second spacing is：
Wherein, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, and the maximum angle is projector
In angle between light after two marginal points refraction of the light that issues of same pixel by exit lens, and two sides
The center that line between edge point passes through exit lens.
4. system according to claim 1, which is characterized in that the arrangement mode of the microlens array includes matrix form row
Cloth or cellular arrangement.
5. system according to claim 1, which is characterized in that the lenticule is light collecting lens.
6. a kind of 3D light field display methods, which is characterized in that including：
Original image is projected on diffusion barrier by array of rear-projectors, wherein array of rear-projectors includes at least two projectors,
Each projector projects a width original image in the diffusion barrier；
Keeping the distance between the array of rear-projectors and the diffusion barrier is the first spacing, by the diffusion barrier by each original
Light in beginning image is diffused；
Light after diffusion is reconstructed into 3D rendering by microlens array, and keeps the microlens array and the diffusion barrier
The distance between be the second spacing；
The 3D rendering is received at the third spacing apart from the microlens array, the third spacing is：
Wherein, g is the second spacing, and f is the focal length of lenticule.
7. according to the method described in claim 6, it is characterized in that, first spacing is：
Wherein, p1For the diameter of the exit lens of projector；θ is maximum angle, and the maximum angle is same pixel in projector
The angle between light after two marginal points refraction of the light that point issues by exit lens, and between two marginal points
The center that line passes through exit lens.
8. according to the method described in claim 6, it is characterized in that, second spacing is：
Wherein, p2For the diameter of lenticule, α is the diffusion angle of diffusion barrier, and θ is maximum angle, and the maximum angle is projector
In angle between light after two marginal points refraction of the light that issues of same pixel by exit lens, and two sides
The center that line between edge point passes through exit lens.
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| CN108828894B (en) | 2020-05-05 |
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